64π unit² is the surface area of the sphere which is correct answer Option(A).
What is surface area of the sphere?
The formula for the surface area of a sphere of radius R is 4πR²
According to question, we have the radius of sphere as 4 units.
So, surface area of a sphere
⇒4πR²
⇒4π(4)²
⇒64π
Hence, the surface area of the sphere is 64π unit².
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